Temnothorax mytilenes

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Aegean Region, Greece (Lesbos, Samos, Kos, Rhodes) and Türkiye (Ayvalık Peninsula). Found in pine forests, pastures, stream valleys with plane trees, and ruderal areas. Nests under moss on stones at altitudes 9-670m ^[1].
• Colony Type: Likely monogyne (single-queen colonies) based on genus patterns, colony structure has not been extensively studied, but most Temnothorax species have one queen per nest.
• Size & Growth:
  • Queen: Undescribed in literature, likely around 3-4mm based on related Temnothorax species
  • Worker: Approximately 2-3mm total length (estimated from related Temnothorax species, scientific measurements of head and mesosoma are available but total length is not directly reported) ^[1]
  • Colony: Up to a few hundred workers, based on typical colony sizes for the genus
  • Growth: Moderate, based on typical Temnothorax development
  • Development: 6-10 weeks at optimal temperature based on genus-level data for similar Mediterranean species (Development time is estimated from related Temnothorax species, actual timing may vary with temperature)
• Antkeeping:
  • Temperature: Keep around 20-24°C. As a Mediterranean species from the Aegean Region, they prefer warmth but not heat. Avoid temperatures above 28°C. Based on their natural habitat at 9-670m elevation ^[1]
  • Humidity: Keep the nest substrate consistently moist but not waterlogged. They nest under moss on stones in damp forests, so provide a moisture gradient with one area distinctly damp. A small water tube in the outworld is useful ^[1]
  • Diapause: Yes, likely requires winter rest based on their temperate Mediterranean climate. Reduce temperature to 10-15°C for 2-3 months (November-February)
  • Nesting: Y-tong (AAC) nests work well due to their tiny size. They also do well in small test tube setups or plaster nests. The key is providing tight chambers and passages scaled to their very small size. Naturalistic setups with moss and stones can also work
• Behavior: These ants are peaceful and not aggressive. Workers are small and timid, foraging actively for small insects and honeydew. Because of their extremely small size, escape prevention is critical, they can squeeze through tiny gaps. Use fine mesh barriers and seal all connections. They have a modified stinger used to smear venom onto enemies, but they rarely use it against humans and pose no danger to keepers ^[1].
• Common Issues: escape prevention is critical due to their very small size, they can slip through gaps that seem sealed, colonies establish slowly and are vulnerable during the first few months, patience is required, overheating can be fatal, keep away from direct heat sources and avoid temperatures above 28°C, dry conditions cause colony decline, monitor nest substrate moisture closely, wild-caught colonies may have parasites that can wipe out the colony in captivity

Housing and Nest Setup

Because Temnothorax mytilenes workers are extremely tiny (around 2-3mm), you need to use nests with very small chambers and passages. A Y-tong (AAC) nest with narrow chambers works excellently for this species. Alternatively, small test tube setups can work for founding colonies, though you may need to use multiple tubes connected as the colony grows. The key requirement is tight-fitting connections, these tiny ants are expert escape artists. Apply fluon or use fine mesh (at least 0.5mm) on all openings. A naturalistic setup with a layer of moist substrate and pieces of moss or small stones can also work well, mimicking their natural habitat under moss on stones ^[1]. Whatever nest type you choose, ensure the chambers are appropriately sized, too-large spaces can stress these small ants.

Temperature and Heating

Keep your colony at temperatures between 20-24°C for optimal development and activity. This Mediterranean species from the Aegean Region prefers warmth but not extreme heat, avoid temperatures above 28°C as this can be fatal ^[1][3]. Room temperature within this range works well for most of the year. During summer, ensure the nest is not in direct sunlight or near heat sources that could cause overheating. If you need extra warmth, provide a gentle temperature gradient using a low-wattage heating cable on one side of the nest, but use it sparingly. In winter, they will benefit from a natural diapause period at cooler temperatures.

Humidity and Water

Temnothorax mytilenes requires consistently moist conditions. In the wild, they nest under moss on stones in damp forest habitats ^[1]. Keep the nest substrate moist but never waterlogged, it should feel damp to the touch. Provide a small water tube in the outworld for drinking. Mist the nest occasionally to maintain humidity, but avoid constant condensation which can lead to mold. The goal is damp conditions that mimic a mossy forest floor, not a swamp. If the substrate dries out quickly, mist more often or use a larger water reservoir.

Feeding and Diet

Feed your colony a mix of protein and sugar sources. For protein, small live prey works best, fruit flies (Drosophila), small mealworms, and tiny crickets are all appropriate. You can also offer small pieces of insects or commercially available ant food. For sugars, offer sugar water, honey diluted with water, or honeydew. These ants are active foragers and will readily take sugar sources. Feed protein roughly twice a week, removing any uneaten prey after 24 hours. Keep sugar water available constantly in a small test tube or feeder. Since workers are so small, cut prey into appropriately tiny pieces ^[3].

Seasonal Care and Winter Dormancy

As a species from the Aegean Region with a Mediterranean climate, Temnothorax mytilenes benefits from a winter rest period. From roughly November through February, reduce the temperature to 10-15°C to simulate winter conditions in their native habitat. You can move the colony to an unheated room, basement, or refrigerator (if properly monitored). During this diapause period, reduce feeding significantly, the colony will be less active and consume less. Do not feed during deep hibernation. In spring, gradually warm the colony back to room temperature and resume normal feeding. This seasonal cycle helps maintain colony health and can trigger reproductive behavior. Skipping hibernation can lead to colony decline over time. ^[3]

Colony Development and Growth

Expect slow but steady colony growth. From founding, queens will lay their first eggs within a week or two. The egg-to-worker timeline is approximately 6-10 weeks at optimal temperature (around 22°C), based on typical Temnothorax development patterns. The first workers (nanitics) will be smaller than mature workers. After that, growth continues steadily but slowly, these are not fast-growing ants. A mature colony likely reaches a few hundred workers over several years. Be patient with founding colonies, they are vulnerable during the initial phase when the queen has no workers to help maintain the nest. Avoid disturbing the queen during founding. Once workers emerge, they will take over nest maintenance and foraging, and the colony will become more resilient. ^[3]

Frequently Asked Questions

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References